The Our Science Literacy Bundle 6 includes fourteen (14) readers with Lexile scores 550L-600L. Reading Level Grade 4.
 
Mollusks are soft-bodied animals that live in oceans, lakes, and on land. They are in the group Mollusca, which is divided into gastropods, bivalves, and cephalopods. All mollusks have the same basic body plan that includes organs and a mantle.
 
In Earth Spheres, young readers learn the earth is sphere-shaped and surrounded by different layers: the geosphere, hydrosphere, biosphere, atmosphere, and magnetosphere. The spheres work together and separately to support life on Earth.  Studying them helps us understand how Earth works.
 
In Geology, young readers are introduced to basic information about how Geologists study Earth to find out how rocks are formed, how mountains are created and what is under the ocean. Changes to Earth can take long periods of time or can occur quickly. By studying Earth we can learn how to take care of it.
 
In Constellations, young readers learn a constellation is a group of stars that forms a shape and has been given a name. Different constellations can be seen from different locations on Earth. Some can be used for navigation. Several constellations are illustrated.
 
Exploding Stars: A star is an object in space that makes its own light & heat energy. Stars are born in clouds of gas and dust and die when they run out of fuel. A big star ends its life in an explosion called a supernova that scatters atoms throughout the universe.
 
A snail is a type of mollusk that has a foot (a large muscle used for moving), eyes on the tips of eyestalks, a toothed tongue called a radula, and a spiral shell. It moves slowly, leaving a trail of slime behind. Snails live on land and in water.
 
Fish are animals that swim in water and are found in lakes, rivers, streams, and oceans.  There are three types of fish: bony fish, cartilage fish, and fish without jaws. Bony fish have a swim bladder that allows them to adjust their depth in water.
 
In Earth's Layers, young readers learn Earth is a terrestrial planet thought to be made of 3 layers: crust, mantle, core. Scientists can’t see the interior of Earth, but studying earthquakes and volcanoes indicates what it may be like. The characteristics of each layer are described.
 
In Moving Plates, young readers learn Earth is made up of different layers. The solid crust and upper mantle are broken up into huge plates that are carried along by the movement of magma in the lower mantle. Plate movements cause earthquakes, volcanoes, and mountain formation.
 
In The Atmosphere, young readers learn the earth’s atmosphere contains the air we breathe and is made up of different gas molecules. Lungs have special cells to take the oxygen out of the air so the body can use it to make energy. All weather occurs in the atmosphere.
 
In The Hydrosphere, young readers learn the hydrosphere is made up of all the water on Earth.  Water exists in three forms—liquid, solid, and water vapor. Water moves around Earth in the water cycle. Water is necessary for life on Earth, and it is important to keep water clean.
 
The octopus is a type of mollusk found in the oceans. The body plan of this cephalopod is described and illustrated. Diet, movement, intelligence, and many other interesting characteristics of octopuses are discussed.
 
In Volcanoes, young readers learn the squeezing of rocks and minerals deep in the Earth causes them to get so hot that they melt to form magma. When magma pushes through a weak spot in Earth’s solid crust, a volcano occurs.  Magma that comes to Earth’s surface is called lava.
 
In Nebulae, young readers learn a nebula is a huge cloud of gas and dust that swirls to make beautiful cosmic art. Some nebulae are areas in space where new stars are formed. Some nebulae are formed when a dying star explodes and turns into gas and dust.